The raunchy comedy debuts on New Year's Day.

Next year, Kaitlin Olson is bringing her charm, wit and R-rated language to Fox’s new comedy “The Mick.” Ahead of its debut, the network released a red band trailer for the raunchy series, which shows how wild Olson can get.

The comedy follows the “It’s Always Sunny in Philadelphia” star as Mickey, a woman who doesn’t have much but ends up getting more than she bargained for. When her wealthy and estranged sister and brother-in-law flee the country to avoid being arrested on fraud charges, Mickey is forced to take care of her nephews and niece: Teen Sabrina (Sofia Black D’Elia), 13-year-old Chip (Thomas Barbusca), innocent seven-year-old Ben (Jack Stanton).

The trailer shows Mickey trying to take care of the children, yet somehow ends up ruining their lives and getting them hurt. They may rebel against her, but in the end it’s kind of hard not to love her – even if she is a hot mess.

“The Mick” will have a special premiere on January 1, with the second episode to air on its regular time slot Tuesday, January 3.